EP2146887A1 - Capteur de roue - Google Patents

Capteur de roue

Info

Publication number
EP2146887A1
EP2146887A1 EP08759474A EP08759474A EP2146887A1 EP 2146887 A1 EP2146887 A1 EP 2146887A1 EP 08759474 A EP08759474 A EP 08759474A EP 08759474 A EP08759474 A EP 08759474A EP 2146887 A1 EP2146887 A1 EP 2146887A1
Authority
EP
European Patent Office
Prior art keywords
resonant circuit
receiver
wheel sensor
transmitter
inductive components
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08759474A
Other languages
German (de)
English (en)
Inventor
Rainer Freise
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2146887A1 publication Critical patent/EP2146887A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/16—Devices for counting axles; Devices for counting vehicles
    • B61L1/167—Circuit details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/16—Devices for counting axles; Devices for counting vehicles
    • B61L1/163—Detection devices
    • B61L1/165—Electrical

Definitions

  • the invention relates to a wheel sensor, in particular for a Gleisokomeldeirriated, with two inductively operating sensor channels having separated by a railroad transmitter and receiver.
  • Wheel sensors are used in the rail industry for the track vacancy, but also for other switching and reporting tasks. In this case, predominantly the magnetic field influencing effect of the iron wheels of rail vehicles is utilized.
  • Two-channel sensors are required to detect the train's direction of travel. When driving a vehicle wheel, the two sensor channels create sequentially offset in time ⁇ Sig nal, which are used for direction detection.
  • the operating according to the inductive mode of action wheel sensors can be in addition to the one- or two-channel design in proximity switches that detect the reaction of the iron wheels on a magnetic field generating sensor, and railroad systems encompassing systems with separate transmitter and receiver.
  • the invention relates to a two-channel wheel sensor with separate transmitter and receiver.
  • a cause of this are rail currents, which are caused by the return ⁇ conductor current of a locomotive, with a harmonic content in the receiver can induce an interference signal in the form of beats.
  • This beating that of the receiving voltage is superimposed, it is difficult to separate from the Radbeeinhneung to be detected, because here low-pass filter fail due to the principle.
  • Another cause of interference voltages can also be arranged adjacent other sensors or sensor channels, which are operated at the same operating frequency and lead by mutual influence of their transmitter to beats.
  • the invention has for its object to provide a gattungsge ⁇ MAESSEN wheel sensor having a simple design, increased interference immunity to interference voltages of different causes.
  • the object is achieved in that EMP inductive Bauele ⁇ elements are catch side the sensor channels associated provided whose Empfangsstörliqueen which impressive ⁇ influence, are equal in magnitude and suppressed by external magnetic fields, both components in a series circuit by subtracting become.
  • the two integrated in the sensor channels inductors are preferably connected in such a manner in series with one another and in opposite directions overall switched at the same field orientation that their sum output voltage free of interference, affecting both inductive Bauele ⁇ elements equally as common mode signals and thus gens intimacy through the overall a polarity or a winding orientation can be compensated. But it is also possible to achieve the compensation of the interference signals at 180 ° different field orientation and the same direction switching of the inductive components. Thus, at a Radüberfahrt in each channel resulting Radkur same ⁇ venverrent, the practical embodiment of the same construction and equal spacing and angular disposition of the inductive components will rest loading against the railroad rail.
  • Compensable disturbances include rail currents, because their coupling into both sensor channels is similarly high, as well as disturbances from other sources, for example as a result of power cables running parallel to the wheel sensor or neighboring sensors.
  • the inductive components are according to claim 2 both the two sensor channels associated receiver coils of a single resonant circuit receiver or according to claim 3, the receiver coil ⁇ two in series interconnected separate resonant circuit receiver.
  • the two receiver coils or the two resonant circuit receivers form a compact circuit part, at the output of which a sum reception signal is produced which is demodulated and evaluated in a subsequent circuit.
  • Each transmitter channel is equipped with its own resonant circuit transmitter according to claim 4, wherein the two resonant circuit transmitter have different operating frequencies. These operating frequencies differ in an order of magnitude in which the beats resulting from the coupling in of the respective other resonant circuit transmitter can be suppressed on the receiving side by a low-pass filter.
  • the operating frequencies may be 40 kHz and 45 kHz.
  • a wheel sensor for the detection of a wheel influence, in which the different working conditions caused by the resonant circuit transmitters Frequencies induced beats are largely eliminated, is characterized according to claim 5, characterized in that an output side of the inductive components having circuit part resulting Summenempfangssignal is supplied in parallel via synchronous rectifiers, which are acted upon by the resonant circuit transmitters, low-pass filter and signal amplifier of a processing unit for level evaluation.
  • the sum receive signal is supplied to two substantially identical signal processing channels and processed in parallel.
  • the demodulation of the sum received signal is effected by synchronous rectification, that is, the phase position of the resonant circuit transmitter acts on the synchronous rectifier for phase-synchronous rectification of the received alternating signal.
  • the sum received signal is again decomposed into its transmitter-specific frequency components and equal ⁇ directed.
  • the following lowpass serves to suppress the beats that have developed on the transmitter side.
  • a signal amplifier for level adjustment the output signal of which is evaluated by a processing unit, in particular a microprocessor.
  • Figure 1 is a block diagram of a first variant of a wheel sensor
  • FIG. 2 shows a second variant in a similar presentation ⁇ example as FIG. 1
  • Both figures show left and right of a railway track 1, a transmitter assembly 2 and a receiver assembly 3.
  • the transmitter assembly 2 has two separate resonant circuit transmitter 4 and 5, the sensor channels A and B are assigned.
  • the Both resonant circuit transmitters 4 and 5 are tuned to different operating frequencies, for example 40 kHz and 45 kHz.
  • the inductive coupling 6 and 7 changed between the transmitter arrangement 2 and the receiver assembly 3, whereby a sum of the received signal 8 is produced in the form of a so-called roll-off curve ⁇ or bell-shaped curve at the output of the receiver assembly. 3
  • This unwinding curve ⁇ is used for wheel detection.
  • the total received signal 8 is supplied to two signal processing channels whose essential components synchronous rectifiers ⁇ 9a and 9b, the low-pass filters 10a and 10b and signal amplifier IIa and IIb are.
  • the synchronous rectifier 9a is driven by the resonant circuit transmitter 4 of the first sensor channel A and the synchronous rectifier 9b is controlled by the resonant circuit transmitter 5 of the second sensor channel B.
  • the phase position 12 or 13 serves for this activation, as a result of which the synchronous rectifiers 9a and 9b can perform a phase-synchronous rectification of the sum reception signal 8 formed as an alternating signal.
  • the sum received signal 8 is again split into its senderspezi ⁇ fishing frequency components and rectified.
  • the beats caused by the coupling of the other resonant circuit transmitter 4 and 5 can be suppressed.
  • This low-pass filtering is possible because of the under defenceli ⁇ Chen transmitter frequencies of the resonant circuit transmitter 4 and 5.
  • the low-pass 10a and 10b is connected via the Sig- naive more IIa or IIb, which is used for level adjustment, with inputs U_A or U_b a micropro ⁇ zessors fourteenth
  • the microprocessor 14 evaluates the analog signals U_a and U_b with regard to their level with the possi ⁇ possibilities of digital signal processing.
  • the embodiments of Figures 1 and 2 differ by the structure of the receiver assembly 3 with respect to a Störtheseskompens Schlierenden mode of operation.
  • the receiver arrangement 3 according to FIG. 1 is designed as a resonant circuit receiver 15 with capacitor 16, resistor 17 and two receiver coils 18 and 19.
  • the two dalespu ⁇ len 18 and 19 are each associated with one of the two sensor channels A and B and wound in opposite directions so that Störsig ⁇ dimensional affecting as common-mode signals are both receiver coils 18 and 19 are alike, are compensated.
  • the receiver coils 18 and 19 are identical as possible to be built identically and ⁇ angeord- net relative to the railroad rail. 1
  • the receiver arrangement 3 is equipped with two resonant circuit receivers 20 and 21 belonging to the two sensor channels A and B.
  • the two resonant circuit receiver 20 and 21 in such opposite directions in
  • the resonant circuit receivers 20 and 21 have the same structure and have the same electrical properties. They are also designed broadband enough, so that the two resonant circuit transmitters 4 and 5, despite different transmitter frequencies induce approximately equally high voltages in the resonant circuit receiver 20 and 21.
  • the broadband is indicated in Figure 2 by a resistance damping in the resonant circuit receivers 20 and 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

L'invention concerne un capteur de roue, destiné en particulier à un système d'annonce de libération de la voie, ce capteur comprenant deux canaux de détection (A, B) à induction qui présentent chacun un émetteur et un récepteur séparés par un rail (1). Selon l'invention, pour compenser les tensions parasites de manière simple et efficace, des composants inductifs sont associés aux canaux de détection (A, B) côté réception, les tensions parasites de réception de ces composants, provoquées par des champs magnétiques extérieurs qui influencent les deux composants, présentant des valeurs identiques et étant supprimées par soustraction dans un circuit en série.
EP08759474A 2007-05-15 2008-05-08 Capteur de roue Withdrawn EP2146887A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710023476 DE102007023476B4 (de) 2007-05-15 2007-05-15 Radsensor
PCT/EP2008/055697 WO2008138860A1 (fr) 2007-05-15 2008-05-08 Capteur de roue

Publications (1)

Publication Number Publication Date
EP2146887A1 true EP2146887A1 (fr) 2010-01-27

Family

ID=39705172

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08759474A Withdrawn EP2146887A1 (fr) 2007-05-15 2008-05-08 Capteur de roue

Country Status (3)

Country Link
EP (1) EP2146887A1 (fr)
DE (1) DE102007023476B4 (fr)
WO (1) WO2008138860A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016211354A1 (de) 2016-06-24 2017-12-28 Siemens Aktiengesellschaft Sendereinrichtung, Sensoreinrichtung und Verfahren zum Erfassen einer Magnetfeldänderung
DE102022201840A1 (de) 2022-02-22 2023-08-24 Gts Deutschland Gmbh Achszählverfahren und Achszählsystem
CN117246375B (zh) * 2023-10-07 2024-04-26 温州市铁路与轨道交通投资集团有限公司 计轴设备电磁干扰过滤方法、装置及计轴设备

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES256178A1 (es) * 1959-03-06 1960-08-01 Ind De Liaisons Electr Soc Un dispositivo detector de desplazamiento de una masa metalica mëvil
DE1530409A1 (de) * 1965-10-12 1969-10-16 Standard Elek K Lorenz Ag Elektromagnetisches Gleisgeraet fuer Eisenbahnsicherungsanlagen
DE3302883A1 (de) * 1983-01-28 1984-08-02 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum erzeugen von achszaehlimpulsen fuer achszaehlanlagen
DE4240478A1 (de) 1992-12-02 1994-06-09 Sel Alcatel Ag Achszählvorrichtung
DE9420736U1 (de) * 1994-12-13 1995-02-09 Siemens AG, 80333 München Einrichtung zum Vermeiden von Fehlzählungen bei der Achszählung im Eisenbahnwesen
DE19709840C2 (de) * 1997-02-28 2001-10-04 Siemens Ag Einrichtung für die Achszählung zum Unterscheiden von Radbeeinflussungen und Nicht-Radbeeinflussungen
AT406139B (de) 1998-04-08 2000-02-25 Frauscher Josef Radsensor
DE10122980A1 (de) 2001-05-11 2002-11-14 Alcatel Sa Radsensoreinrichtung (Schienenkontakt) bei Gleisanlagen, mit Mitteln zum Schutz vor elektromagnetischen Störungen
DE10137519A1 (de) 2001-07-30 2003-02-13 Siemens Ag Radsensor
DE10221577B3 (de) * 2002-05-08 2004-03-18 Siemens Ag Magnetischer Radsensor
EP1541440B1 (fr) 2003-12-08 2006-02-15 Alcatel Procédé pour modulation de phase d'un circuit résonant électrique et électromagnétique, particulièrement pour compteurs d'essieux
DE102005034641B3 (de) * 2005-07-20 2007-03-08 Siemens Ag Schaltungsanordnung zur Überwachung des Belegungszustandes einer Weiche oder eines Gleisbereichs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008138860A1 *

Also Published As

Publication number Publication date
WO2008138860A1 (fr) 2008-11-20
DE102007023476B4 (de) 2009-07-09
DE102007023476A1 (de) 2008-11-20

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